Disable Pre-authentication in IE RRS feed

  • Question

  • Hello all,

    in our environment, there are some users who don't have AD account and need to use SSO with a web application but it failes with Win7/IE8

    there is a suggested solution to disable PreAuthentication in IE by the following:

    1. On Client PC, navigate to  “regedit/HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Internet Settings/”
    2. Add a new DWORD entry “DisableNTLMPreAuth”
    3. Change/modify its decimal value to “1”

    could you please advise if this is has any security impact? and any link which discuss in details what is this IE preauthentication?

    Thanks & Regards

    Tuesday, July 30, 2013 12:30 PM

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